Fixed assets - revaluation

 Dear all.

We are building an environment to provide a proof of concept and enabling the Uk local authority accounting option in book controls for impairment and revaluations.

I'm going through a few scenarios to ensure the accounting entries are correctly working, however, I'm attempting to create a revaluation Loss using mass revaluations and entering in the asset details including the NBV and entering an NBV lower than the what it currently stands as to create the loss. When entering a low ever value than NBV I'm receiving the following error message; "only positive revaluations are allowed. Enter a net book value greater than xxxxxx"